Replace http://man7.org links with https://man7.org links.

I suspect the way http:// dies is that browsers just interpret it as
https:// anyway, but there's no reason not to just bulk fix all these at
source.

Change-Id: I38fa91728846d7c33207ef1bdadd4910eac9e941
diff --git a/libc/include/termios.h b/libc/include/termios.h
index 7abff5d..5eecfcd 100644
--- a/libc/include/termios.h
+++ b/libc/include/termios.h
@@ -46,25 +46,25 @@
 // in cfmakeraw() and cfsetspeed() until 28.
 
 /**
- * [cfgetispeed(3)](http://man7.org/linux/man-pages/man3/cfgetispeed.3.html)
+ * [cfgetispeed(3)](https://man7.org/linux/man-pages/man3/cfgetispeed.3.html)
  * returns the terminal input baud rate.
  */
 speed_t cfgetispeed(const struct termios* _Nonnull __t);
 
 /**
- * [cfgetospeed(3)](http://man7.org/linux/man-pages/man3/cfgetospeed.3.html)
+ * [cfgetospeed(3)](https://man7.org/linux/man-pages/man3/cfgetospeed.3.html)
  * returns the terminal output baud rate.
  */
 speed_t cfgetospeed(const struct termios* _Nonnull __t);
 
 /**
- * [cfmakeraw(3)](http://man7.org/linux/man-pages/man3/cfmakeraw.3.html)
+ * [cfmakeraw(3)](https://man7.org/linux/man-pages/man3/cfmakeraw.3.html)
  * configures the terminal for "raw" mode.
  */
 void cfmakeraw(struct termios* _Nonnull __t);
 
 /**
- * [cfsetspeed(3)](http://man7.org/linux/man-pages/man3/cfsetspeed.3.html)
+ * [cfsetspeed(3)](https://man7.org/linux/man-pages/man3/cfsetspeed.3.html)
  * sets the terminal input and output baud rate.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -72,7 +72,7 @@
 int cfsetspeed(struct termios* _Nonnull __t, speed_t __speed);
 
 /**
- * [cfsetispeed(3)](http://man7.org/linux/man-pages/man3/cfsetispeed.3.html)
+ * [cfsetispeed(3)](https://man7.org/linux/man-pages/man3/cfsetispeed.3.html)
  * sets the terminal input baud rate.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -80,7 +80,7 @@
 int cfsetispeed(struct termios* _Nonnull _t, speed_t __speed);
 
 /**
- * [cfsetospeed(3)](http://man7.org/linux/man-pages/man3/cfsetospeed.3.html)
+ * [cfsetospeed(3)](https://man7.org/linux/man-pages/man3/cfsetospeed.3.html)
  * sets the terminal output baud rate.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -88,7 +88,7 @@
 int cfsetospeed(struct termios* _Nonnull __t, speed_t __speed);
 
 /**
- * [tcdrain(3)](http://man7.org/linux/man-pages/man3/tcdrain.3.html)
+ * [tcdrain(3)](https://man7.org/linux/man-pages/man3/tcdrain.3.html)
  * waits until all output has been written.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -96,7 +96,7 @@
 int tcdrain(int __fd);
 
 /**
- * [tcflow(3)](http://man7.org/linux/man-pages/man3/tcflow.3.html)
+ * [tcflow(3)](https://man7.org/linux/man-pages/man3/tcflow.3.html)
  * suspends (`TCOOFF`) or resumes (`TCOON`) output, or transmits a
  * stop (`TCIOFF`) or start (`TCION`) to suspend or resume input.
  *
@@ -105,7 +105,7 @@
 int tcflow(int __fd, int __action);
 
 /**
- * [tcflush(3)](http://man7.org/linux/man-pages/man3/tcflush.3.html)
+ * [tcflush(3)](https://man7.org/linux/man-pages/man3/tcflush.3.html)
  * discards pending input (`TCIFLUSH`), output (`TCOFLUSH`), or
  * both (`TCIOFLUSH`). (In `<stdio.h>` terminology, this is a purge rather
  * than a flush.)
@@ -115,7 +115,7 @@
 int tcflush(int __fd, int __queue);
 
 /**
- * [tcgetattr(3)](http://man7.org/linux/man-pages/man3/tcgetattr.3.html)
+ * [tcgetattr(3)](https://man7.org/linux/man-pages/man3/tcgetattr.3.html)
  * reads the configuration of the given terminal.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -123,7 +123,7 @@
 int tcgetattr(int __fd, struct termios* _Nonnull __t);
 
 /**
- * [tcgetsid(3)](http://man7.org/linux/man-pages/man3/tcgetsid.3.html)
+ * [tcgetsid(3)](https://man7.org/linux/man-pages/man3/tcgetsid.3.html)
  * returns the session id corresponding to the given fd.
  *
  * Returns a non-negative session id on success and
@@ -132,7 +132,7 @@
 pid_t tcgetsid(int __fd);
 
 /**
- * [tcsendbreak(3)](http://man7.org/linux/man-pages/man3/tcsendbreak.3.html)
+ * [tcsendbreak(3)](https://man7.org/linux/man-pages/man3/tcsendbreak.3.html)
  * sends a break.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
@@ -140,7 +140,7 @@
 int tcsendbreak(int __fd, int __duration);
 
 /**
- * [tcsetattr(3)](http://man7.org/linux/man-pages/man3/tcsetattr.3.html)
+ * [tcsetattr(3)](https://man7.org/linux/man-pages/man3/tcsetattr.3.html)
  * writes the configuration of the given terminal.
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.